Headphone device



FIG. 1 is a perspective view of a headphone device showing my new design, as viewed from the top and front.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a back elevational view thereof.

FIG. 4 is an outer side elevational view thereof.

FIG. 5 is an opposite side elevational view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict environment that forms no part of the claimed design. 

CLAIM The ornamental design for a headphone device, as shown and described. 